How the finite element method helps explaining fatigue crack growth retardation and acceleration

Johan Maljaars, Lisa Tang

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
9 Downloads (Pure)

Abstract

Crack closure effects during fatigue crack growth have been studied by many researchers with the finite element method, but appears difficult to accurately predict. Although quantification of crack closure may be a bridge too far, finite element models may help explaining observations from tests and give insight into trends. This paper studies crack closure resulting from large stress peaks (overloads) and deep valleys (underloads) in a further constant amplitude load. Middle tension and single edge notched specimens of steel and aluminium are simulated. Effects of overloads and of combinations of overloads and underloads for the two geometries and materials are studied and explanations for experimental observations are provided.
Original languageEnglish
Pages (from-to)69-108
Number of pages40
JournalHeron
Volume65
Issue number1/2
Publication statusPublished - 2020

Keywords

  • Crack growth acceleration
  • Fatigue
  • Fracture mechanics
  • Overload effect
  • Plasticity induced crack closure
  • Retardation

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